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Package Leaflet: Information for the Patient
MontelukastViatris4 mg Chewable Tablets EFG
For Children from 2 to 5 Years of Age
Read all of this leaflet carefully before your child starts taking this medicine because it contains important information for them.
Contents of the Package Leaflet
Montelukast Viatris contains montelukast, which is a leukotriene receptor antagonist that blocks substances called leukotrienes. Leukotrienes cause narrowing and swelling of the airways in the lungs. By blocking leukotrienes, Montelukast Viatris improves asthma symptoms and helps control asthma.
Your doctor has prescribed Montelukast Viatris for your child to treat asthma and prevent asthma symptoms during the day and night.
Depending on your child's symptoms and the severity of their asthma, your doctor will determine how your child should use Montelukast Viatris.
What is Asthma?
Asthma is a chronic disease.
Asthma includes:
Asthma symptoms include: coughing, wheezing, and chest congestion.
Tell your doctor about any allergy or medical problem your child has now or has had.
Do not give Montelukast Viatris to your child:
Warnings and Precautions
Children and Adolescents
Do not give this medicine to children under 2 years of age.
For children from 2 to 5 years of age, Montelukast Viatris 4 mg may be available.
For children from 6 to 14 years of age, Montelukast Viatris 5 mg may be available.
Other Medicines and Montelukast Viatris
Some medicines may affect how Montelukast Viatris works, or Montelukast Viatris may affect how other medicines your child is using work.
Tell your doctor or pharmacist if your child is taking, has recently taken, or might take any other medicines, including those obtained without a prescription.
Before taking Montelukast Viatris, tell your doctor if your child is taking the following medicines:
Pregnancy and Breastfeeding
This subsection is not applicable to Montelukast Viatris 4 mg chewable tablets EFG, as it is intended for use in children between 2 and 5 years of age. However, the following information is important for the active ingredient, montelukast.
Use in Pregnancy
If you are pregnant, think you may be pregnant, or plan to become pregnant, consult your doctor or pharmacist before taking this medicine. Your doctor will assess whether you can take montelukast during this period.
Use in Breastfeeding
It is unknown whether montelukast appears in breast milk. If you are breastfeeding or plan to breastfeed, you should consult your doctor before taking Montelukast Viatris.
Driving and Using Machines
This subsection is not applicable to Montelukast Viatris 4 mg, as it is intended for use in children between 2 and 5 years of age. However, the following information is important for the active ingredient, montelukast.
Montelukast is not expected to affect your child's ability to drive a car or operate machinery. However, individual responses to the medication may vary. Certain side effects (such as dizziness and drowsiness) that have been rarely reported with montelukast may affect your child's ability to drive or operate machinery.
Montelukast Viatris Contains Aspartame and Sodium
This medicine contains 2 mg of aspartame in each tablet.
Aspartame is a source of phenylalanine that may be harmful in cases of phenylketonuria (PKU), a rare genetic disorder in which phenylalanine accumulates because the body is unable to eliminate it properly.
If your child has phenylketonuria, note that each 4 mg tablet contains phenylalanine (equivalent to 1.12 mg of phenylalanine per chewable tablet).
This medicine contains less than 1 mmol of sodium (23 mg) per tablet; this is essentially "sodium-free".
Always give this medicine to your child exactly as their doctor or pharmacist has told them. If you are not sure, ask your doctor or pharmacist again.
For Children from 2 to 5 Years of Age:
The recommended dose is one 4 mg chewable tablet taken daily in the evening. Montelukast Viatris should not be taken with food; it should be taken 1 hour before or 2 hours after food.
If your child is taking Montelukast Viatris, ensure they do not take any other product containing the same active ingredient, montelukast.
If Your Child Takes More Montelukast Viatris Than They Should
Seek help from your child's doctor immediately.
In case of overdose or accidental ingestion, consult your doctor or pharmacist immediately or call the Toxicology Information Service (telephone 91 562 04 20) indicating the medicine and the amount ingested.
In most cases of overdose, no adverse effects were reported. The symptoms that occurred most frequently reported in overdose in adults and children were abdominal pain, drowsiness, thirst, headache, nausea, and hyperactivity.
If You Forget to Give Montelukast Viatris to Your Child
Try to give Montelukast Viatris as prescribed. However, if your child misses a dose, just resume the usual routine of one tablet once a day.
Do not give your child a double dose to make up for missed doses.
If Your Child Stops Taking Montelukast Viatris
Montelukast Viatris can only treat your child's asthma if they continue taking it.
It is essential that your child continues taking Montelukast Viatris for as long as their doctor prescribes it. It will help control your child's asthma.
If you have any other questions about the use of this medicine, ask your child's doctor or pharmacist.
Like all medicines, this medicine can cause side effects, although not everybody gets them.
If your child experiences any of the following side effects, stop giving them this medicine and consult their doctor immediately or go to the nearest hospital emergency department:
Uncommon(may affect up to 1 in 100 people)
Rare(may affect up to 1 in 1,000 people)
Very Rare(may affect up to 1 in 10,000 people)
In patients with asthma treated with montelukast, very rare cases of a combination of symptoms such as flu-like illness, tingling or numbness of arms or legs, worsening lung symptoms, and/or skin rash (Churg-Strauss syndrome) have been reported. You should tell your doctor immediately if your child has one or more of these symptoms.
In clinical trials with montelukast 4 mg chewable tablets, the most frequently reported side effects (occurring in up to 1 in 10 children) were:
Additionally, the following side effect was reported in clinical trials with montelukast 10 mg film-coated tablets and montelukast 5 mg chewable tablets:
These were generally mild and occurred with a higher frequency in patients treated with montelukast tablets than in those treated with placebo (a pill that does not contain medicine).
Additionally, since the medicine has been marketed, the following side effects have been reported:
Very Common(may affect more than 1 in 10 people)
Common(may affect up to 1 in 10 people)
Uncommon(may affect up to 1 in 100 people)
Rare(may affect up to 1 in 1,000 people)
Very Rare(may affect up to 1 in 10,000 people)
Reporting of Side Effects:
If your child experiences any side effects, talk to their doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly through the Spanish Medicines Monitoring System for Human Use: https://www.notificaram.es. By reporting side effects, you can help provide more information on the safety of this medicine.
Composition of Montelukast Viatris
Appearance of the Product and Package Contents
White or almost white, oval-shaped tablets, with curved sides, marked with "M" on one side and "MS1" on the other side.
It is available in:
Blisters of 7, 10, 14, 20, 28, 30, 50, 56, 98, 100, 112 or 200 tablets, or in single-dose perforated blisters of 28 tablets.
White plastic bottles with a non-transparent white cap, containing absorbent cotton and a desiccant (do not eat the desiccant), containing 28, 56, 100, 112, 200 and 500 tablets.
Only some package sizes may be marketed.
Marketing Authorization Holder and Manufacturer
Marketing Authorization Holder:
Viatris Limited
Damastown Industrial Park
Mulhuddart, Dublin 15
Dublin
Ireland
Manufacturer:
McDermott Laboratories Limited trading as Gerard Laboratories
35/36 Baldoyle Industrial Estate
Grange Road, Dublin 13
Ireland
Or
Mylan Hungary Kft
H-2900 Komárom
Mylan utca 1
Hungary
Or
Mylan Germany GmbH
Zweigniederlassung Bad Homburg v. d. Hoehe
Benzstrasse 1
Bad Homburg v. d. Hoehe
Hessen, 61352
Germany
You can request more information about this medicine by contacting the local representative of the marketing authorization holder:
Viatris Pharmaceuticals, S.L.U.
C/ General Aranaz, 86
28027 - Madrid
Spain
This medicine is authorized in the Member States of the European Economic Area under the following names:
Germany: Montelukast Mylan 4 mg Chewable Tablets
Spain: Montelukast Viatris 4 mg chewable tablets EFG
Ireland: Montelukast Mylan 4 mg chewable Tablets
Italy: Montelukast Mylan
Malta: Montelukast Mylan 4 mg
Portugal: Montelucaste Mylan
United Kingdom (NI): Montelukast 4 mg chewable Tablets
Czech Republic: Montelukast Mylan 4 mg chewable tablets
Date of the last revision of this leaflet:April 2024
Detailed information about this medicine is available on the website of the Spanish Agency for Medicines and Health Products (AEMPS) https://www.aemps.gob.es/
The average price of MONTELUKAST VIATRIS 4 mg CHEWABLE TABLETS in November, 2025 is around 16.84 EUR. Prices may vary depending on the region, pharmacy, and whether a prescription is required. Always check with a local pharmacy or online source for the most accurate information.
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